Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing

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dc.contributor University of Helsinki, INAR Physics en
dc.contributor University of Helsinki, INAR Physics en
dc.contributor University of Helsinki, Chinese Academy of Sciences en
dc.contributor University of Helsinki, INAR Physics en
dc.contributor University of Helsinki, Institute for Atmospheric and Earth System Research (INAR) en
dc.contributor University of Helsinki, Institute for Atmospheric and Earth System Research (INAR) en
dc.contributor University of Helsinki, Institute for Atmospheric and Earth System Research (INAR) en
dc.contributor University of Helsinki, Institute for Atmospheric and Earth System Research (INAR) en
dc.contributor.author Wang, Yonghong
dc.contributor.author Yu, Miao
dc.contributor.author Wang, Yuesi
dc.contributor.author Tang, Guiqian
dc.contributor.author Song, Tao
dc.contributor.author Zhou, Putian
dc.contributor.author Liu, Zirui
dc.contributor.author Hu, Bo
dc.contributor.author Ji, Dongsheng
dc.contributor.author Wang, Lili
dc.contributor.author Zhu, Xiaowan
dc.contributor.author Yan, Chao
dc.contributor.author Ehn, Mikael
dc.contributor.author Gao, Wenkang
dc.contributor.author Pan, Yuepeng
dc.contributor.author Xin, Jinyuan
dc.contributor.author Sun, Yang
dc.contributor.author Kerminen, Veli-Matti
dc.contributor.author Kulmala, Markku
dc.contributor.author Petaja, Tuukka
dc.date.accessioned 2020-04-17T09:52:01Z
dc.date.available 2020-04-17T09:52:01Z
dc.date.issued 2020-01-03
dc.identifier.citation Wang , Y , Yu , M , Wang , Y , Tang , G , Song , T , Zhou , P , Liu , Z , Hu , B , Ji , D , Wang , L , Zhu , X , Yan , C , Ehn , M , Gao , W , Pan , Y , Xin , J , Sun , Y , Kerminen , V-M , Kulmala , M & Petaja , T 2020 , ' Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing ' , Atmospheric Chemistry and Physics , vol. 20 , no. 1 , pp. 45-53 . https://doi.org/10.5194/acp-20-45-2020 en
dc.identifier.issn 1680-7316
dc.identifier.other PURE: 132510335
dc.identifier.other PURE UUID: 7b02edb8-d9de-46ef-b396-372b8894698e
dc.identifier.other WOS: 000505676600001
dc.identifier.other ORCID: /0000-0003-0803-7337/work/72305854
dc.identifier.uri http://hdl.handle.net/10138/314162
dc.description.abstract Although much effort has been put into studying air pollution, our knowledge of the mechanisms of frequently occurring intense haze episodes in China is still limited. In this study, using 3 years of measurements of air pollutants at three different height levels on a 325m Beijing meteorology tower, we found that a positive aerosol-boundary layer feedback mechanism existed at three vertical observation heights during intense haze polluted periods within the mixing layer. This feedback was characterized by a higher loading of PM2.5 with a shallower mixing layer. Modelling results indicated that the presence of PM2.5 within the boundary layer led to reduced surface temperature, relative humidity and mixing layer height during an intensive haze episode. Measurements showed that the aerosol-boundary layer feedback was related to the decrease in solar radiation, turbulent kinetic energy and thereby suppression of the mixing layer. The feedback mechanism can explain the rapid formation of intense haze episodes to some extent, and we suggest that the detailed feedback mechanism warrants further investigation from both model simulations and field observations. en
dc.format.extent 9
dc.language.iso eng
dc.relation.ispartof Atmospheric Chemistry and Physics
dc.rights en
dc.subject 114 Physical sciences en
dc.title Rapid formation of intense haze episodes via aerosol-boundary layer feedback in Beijing en
dc.type Article
dc.description.version Peer reviewed
dc.identifier.doi https://doi.org/10.5194/acp-20-45-2020
dc.type.uri info:eu-repo/semantics/other
dc.type.uri info:eu-repo/semantics/publishedVersion
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